Master's MateSafety Initiative Network
The Master's Mate Safety Initiative Network (MMSIn) — like AAA for the ocean, but free & community-driven. Cruisers keeping each other safe: anchor-drag & distress alerts, a verified captains directory, and a watch network that has your back.
Tanker
YOHO
Tanker · last seen 35°N 135°E · Jun 2026 · MMSI 636020393 · Call sign D5YZ9
Not yet on Master's MateType
Tanker
Length
339 m
Beam
60 m
Draft
12.3 m
Call sign
D5YZ9
IMO
9878644
First reported
Jun 2026
Last reported
Jun 2026
AIS reports
13
YOHO is a tanker, 339 metres long. Below, she has a beam measuring 60 metres and a draft of 12.3 m. She's on record as MMSI 636020393, call sign D5YZ9, IMO 9878644. The Master's Mate Safety Initiative Network welcomes YOHO — free to join, cruiser-run, and always on watch.
Free forever · No credit card · for commercial operators
Eyes on YOHO, around the clock.
Real-time AIS, full systems telemetry, distress alerting and worldwide charts — your hull on one dashboard, from anywhere.
Put her on the dashboard — free →Takes 60 seconds · Your data stays yours · Built by cruisers, for cruisers
Live AIS position · Jun 15, 2026 15:42 UTC
Position
34.5605° N, 135.3113° E
Status
At anchor
Speed
0.0 kn
Course
313°
Destination
JP SAK
ETA
06-16 00:15 UTC
Transiting the Sea of Japan? You're never out there alone.
Thousands of cruisers on the Master's Mate Network — ready to help the moment something goes wrong.
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The most powerful cruising platform ever built — yours, free.
Joining the Safety Initiative Network doesn't just put YOHO on the map. It hands you the full bridge:
Live AIS & Traffic
See every vessel around you in real time. Closest-approach warnings before they matter.
Systems Monitoring
Batteries, bilge, tanks, Victron & NMEA 2000 telemetry — your whole boat on one dashboard.
Distress Mesh
Mayday & Pan-Pan that ripple out to nearby cruisers — a watch network that has your back.
Worldwide Charts
Navionics-grade vector charts, satellite & raster overlays, online or off. Your whole cruising ground.
Weather & Routing
GRIB wind, swell & current on the chart. Plan passages with ETA-calibrated forecasts per leg.
Anchor Watch
GPS-precise drag alarms that actually wake you — and your whole crew. Sleep through the night.
Onboard Cameras
Watch your boat from anywhere — live feeds and 24h recording, straight from your gateway.
Hail Any Captain
A verified captains directory + direct hailing. Reach the boat next to you, or across the bay.
Claim YOHO and switch it all on
Free to join · nothing to install to start · cancel anytime
About YOHO
What kind of vessel is YOHO?
YOHO is a Tanker.
Where was YOHO last seen?
YOHO was last reported in the Sea of Japan in Jun 2026 on public AIS.
What is YOHO's MMSI?
YOHO's MMSI is 636020393. Call sign D5YZ9. IMO 9878644.
How big is YOHO?
YOHO is about 339 m long, 60 m on the beam, drawing 12.3 m.
Is YOHO on the Master's Mate Safety Initiative Network?
Not yet. If YOHO is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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